Fixed header so that native bot implementation doesn't complain

src/BuildingPlacer.h

@@ -29,7 +29,7 @@ public:
     bool canBuildHereWithSpace(int bx, int by, const UnitType & type, int buildDist) const;
 
     // returns a build location near a building's desired location
-    CCTilePosition getBuildLocationNear(const CCTilePosition & p, const UnitType & type, int buildDist, int search_count) const;
+    CCTilePosition getBuildLocationNear(const CCTilePosition & p, const UnitType & type, int buildDist, int search_count = 1000) const;
 
     void drawReservedTiles();